<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>俄罗斯方块</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      text-align: center;
    }

    #panel {
      background-color: #000;
      position: relative;
    }

    #next {
      width: 200px;
    }

    #next-tip {
      position: relative;
    }

    #root {
      margin: 0 auto;
      display: flex;
      justify-content: center;
    }

    #score-tip {
      color: #f00;
      font-size: 30px;
      line-height: 50px;
    }

    #tip {
      margin-left: 20px;
    }
  </style>
</head>

<body>

  <div id="root">
    <div id="panel"></div>
    <div id="tip">
      <div id="next-tip"></div>
      <div id="score-tip">0</div>
      <div class="oper-tip">
        <p>空格 开始/暂停</p>
        <p>↑ 旋转</p>
        <p>← 向左移动</p>
        <p>→ 向右移动</p>
        <p>↓ 向下移动</p>
      </div>
    </div>
  </div>
</body>

</html>